I'm currently playing a game on a gigantic map and I am in the cleanup phase. It's now just me and the Terrans and while I've ramped up transport production they still have a bunch of worlds left. Anyway, I've managed to get them on the diplo screen and they won't even think of peace treaty. (I figured, sue for peace and get some free planets while I build more transports.) But their response is that my ploy of declaring peace and then quickly returning to war is "disgusting." The problem is that we never were at peace! We've been at war for quite awhile and I never offered or accepted a peace treaty. Obviously though, what they are suggesting is exactly what I intended to do. Freaky.